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Marketable Securities
 6 Months Ended
Oct. 29, 2011
Marketable Securities [Abstract]  
Marketable Securities
Note 11.  Marketable Securities

We have a cash management program which provides for the investment of cash balances not used in current operations.  We classify our investments in marketable securities as available-for-sale in accordance with the provisions of ASU 320, Investments - Debt and Equity Securities.  Marketable securities classified as available-for-sale are reported at fair value with unrealized gains or losses, net of tax, reported in other comprehensive income.  Unrealized losses considered to be "other-than-temporary" are recognized currently in earnings.  The cost of securities sold is based on the specific identification method.  Where quoted market prices are not available, we use the market price of similar types of securities that are traded in the market to estimate fair value.  As of October 29, 2011 and April 30, 2011, our available-for-sale securities consisted of the following:
 
   
Cost
  
Fair Value
  
Carrying Value
  
Gross Unrealized Gains
  
Gross Unrealized Losses
 
Balance as of October 29, 2011
               
Certificates of deposit
 $6,654  $6,654  $6,654  $-  $- 
U.S. Treasury bills
  2,000   2,000   2,000   -   - 
U.S. Government sponsored entities
  13,539   13,601   13,601   62   - 
Municipal bonds
  3,394   3,408   3,408   14   - 
Total
 $25,587  $25,663  $25,663  $76  $- 
                      
Balance as of April 30, 2011
                    
Certificates of deposit
 $4,913  $4,913  $4,913  $-  $- 
U.S. Treasury bills
  1,998   1,999   1,999   1   - 
U.S. Government sponsored entities
  13,598   13,617   13,617   19   - 
Municipal bonds
  2,412   2,414   2,414   2   - 
Total
 $22,921  $22,943  $22,943  $22  $- 

 
All available-for-sale securities are classified as current assets, as they are readily available to support our current operating needs. The contractual maturities of available-for-sale debt securities as of October 29, 2011 were as follows:

 
   
Less than 12 months
  
Greater than 12 months
  
Total
 
Certificates of deposit
 $5,420  $1,234  $6,654 
U.S. Treasury bills
  2,000   -   2,000 
U.S. Government sponsored agencies
  5,036   8,565   13,601 
Municipal obligations
  258   3,150   3,408 
   $12,714  $12,949  $25,663